Combination length bar



May 10, 1949. K. E. HALLIN 2,469,502

COMBINATION LENGTH BAR Fil ed June 21, 1946 2 Sheets-Sheet 1 5i f H J I I I 2.0521 2.2 2.: 2.4 2.5 2.6 2.7 2.6 2.9 I 2 4 Inventor:

Karl E fi/r E yer? alll'n W 15 ow fitter/E1 y 1949- K. E. E. HALLlN 2,469,502

COMBINATION LENGTH BAR Filed. June 21, 1946 2 Sheefis-Sheet 2 Inrebfor Karl Erik E verl all/n by 30 W Patented May 10, 1949 COMBINATION LENGTH BAR Karl Erik Evert Hallin, Eskilstuna, Sweden, assignor to Aktiebolaget C. E. Johansson, Eskilstuna, Sweden, a company of Sweden Application June 21, 1946, Serial No. 678,489 In Sweden June 25, 1945 4 Claims.

The present invention relates to a length gauge or combination length bar which is assembled from several parts or members and which is intended to be used as a factory gauge in the place of the assignees well-known combination gauge block sets in such cases when accurate measures are not required such as those that may be obtained by the use of the said gauge block sets. Like the said gauge block sets, the present length bar or gauge comprises a plurality of gauge blocks having plane and parallel measuring surfaces, but, with a view to lowering the cost of production these surfaces are not made so accurate that they adhere to one another clue to the force of adhesion alone. For this reason the gauge blocks must be combined with a device for holding the blocks together so that the desired measures may be obtained. A length bar or gauge of the type here contemplated, therefore, comprises a bolt or stud, one or more gauge blocks having plane and parallel measuring surfaces and which are provided with through holes perpendicular to the said measuring surfaces so that they may be pushed onto the bolt or stud, and an end sleeve having a definite length in which the bolt or stud, with the gauge block or blocks thereon, may be inserted and to which it may be locked. In order to obtain a certain measure it is merely necessary to push onto the bolt a suitable number of gauge blocks so chosen that together with the length of the end sleeve and the length of the head, if any, of the bolt, they give the desired measure. and then insert the bolt in the end sleeve.

According to the present improvement, the bolt is provided at its free end, which is adapted to be inserted in the end sleeve, with a conical screw onto which a slotted nut having a corresponding conical screw thread is screwed, so that when the bolt has been inserted in the end sleeve and is afterwards turned relatively to the same, the nut is expanded and pressed against the inner side of the sleeve, thus locking the bolt in the end sleeve. In this way it is possible to effect an easy and ra id locking of the bolt in the end sleeve without disturbing the value of the measure. When the bolt is turned and the nut is expanded and pressed against the inner side of the sleeve, the nut tends to pull the bolt inwards into the sleeve which ensures that the gauge bloclrs will contact closely with one another and with the sleeve and the head of the bolt. The slotted nut may be provided with a projection on its outer side w ich is otherwise cylindrical, said projection being adapted to engage a longitudinal groove in the inner side of the end sleeve in order to prevent the nut from being carried along when the bolt is turned, the gauge blocks being preferably provided with corresponding notches or grooves so that the projection on the nut will not prevent the blocks from being pushed onto the bolt.

The accompanying drawings illustrate by way of example a constructional form of a length gauge or bar according to the invention. Figs. la and 1b show a plurality of gauge blocks of diiierent lengths to be used for assembling the gauge, and Fig. 2 shows an end View of one of these gauge blocks. Figs. 3a, 3b and 30 show three bolts of different lengths onto which bolts the gauge blocks are to be pushed. Figs. 4a, 4b and 40 show three end sleeves of different lengths, and Fig. 5 shows an end view of one of these sleeves. Fig. 6 shows to a larger scale and in axial section one end of a bolt with its conical screw, and Fig, 7 shows the associate nut viewed from one end. Finally, Fig. 8 shows, also to a larger scale, an assembled length gauge or bar according to the invention.

Figs. 1a and 1b show a plurality of gauge blocks, nineteen in all, having different lengths of measures. These gauge blocks l' consist of round Washers or cylinders which are provided with plane and parallel end surfaces which constitute the measuring surfaces, and with through holes 2 perpendicular to said measuring surfaces and of such size that the gauge blocks may be pushed onto any one of the bolts illustrated in Figs. 3a, 3b and 30. For a purpose to be explained here below, each gauge block is provided with a notch or groove 4 at one side of the through hole 2. The nineteen gauge blocks are arranged in two series, the first series shown in Fig. 1a comprising ten blocks representing the values 2.05, 2.1. 2.2, 2.3 2.8 and 2.9 mm., while the second series shown in Fig. 11) comprises nine b ocks representing the values 1, 2, 3, 4, 5, 10, 20, 30, and 50 mm. These measures represent the distance between the plane end surfaces of the gauge blocks.

Each of the bolts 3 illustrated in Figs. 3a, 3b and 3c is provided at one end with a knurled head 5 for turning the bolt, and at the other end with a short conical screw 6 which is preferably made integral with the bolt, as shown in Fig. 6. Screw-threaded onto said screw is a nut 1 having a corresponding conical screw thread and which is split at 8 at one point of its circumference and is provided at two other points with comparatively deep slots 9. In this way the nut is capable of expanding comparatively easily, when it is screwed further onto the conical screw 6. Each nut I has the same outer diameter as the diameter of the holes 2 in the gauge block's I, and is provided on its outside with a projection which, in the instance illustrated, consists of a pin ID the head of- -,wh;ich ehasisuch shape that it can; pass freely thmu h thesnqtches or grooves 4 .iuth gauge blocks I when the latter are pushed onto the bolts 3. The screw 6 is provided with a screw threaded bore I l into which a loclgsciew l5. may.

be inserted, as shown in Fig. 8, forprevent-ing the nut 1 from being screwed lcoseetrom the-screw 6 and from being lost.

When assembling the gauge, one =ofttheeboltss illustrated in Figs. 3a, 3b and is ins erted in one of the three end sleeves l2'illustratedirt'Figs.

4a, 4b and 4c. The sleeves have different lengths, but are otherwise constructed in the samamanner, and have a hexaggnal cross-sectional shape, .in-the instance illustrated.semen-s eeve .ismlos at ne e dwbyemeanslefran endear): la atitspppositeendn -tudina1-,-.bore; ha kicrsameediameteras the qutsidjeidlamete z qfntheihelt iQandthe Edi-aimt ofth heiressme sesu eiblcck 1.: Ea h e, rofil-eyas the s uthat it i n w thi-tneir-nuts l, and

awshowni vEi tfianan. h "the valu 2.2 earned; t r e-real se .nt r't sabolt p -tow.the .-nead- 5 send: th .rbolt carr l .esleeve: l-zv .-in.--the.:s ee ,Byrmea ahead 5;; the: b -3:is thenturned actio re ativeln et z-sl e I theta. "nu man a p ev nted fro turnina-by h mqieet en 15 is scr w d f th r 119-210.. .6. vo -,th. .-:b 1t 3 =-6Z:2 2mm; -rnOw ready and, may: be used ion mfiafiu lllfggpflpela tions in, the usual manner: 1. It; shukl debe rQbSBlYed; that when -3.. ing turn d a 'nStt-h win he le v :'In- ;this away; .12 .tensuredi that the cther-andwiththeheadzi andthe ends eeve- The constructional form above described and 4 illustrated in the drawings is only to be regarded as an example, and its details may, of course, be modified in several ways without departing from the principle of the invention.

I claim: A combinati n lenethtbareccmp i n a lt,

,.a.-.number'0f g 1l locksrhavi g p eneand allel measuring surfaces and provided with ;through holes perpendicular to said measuring 10.,

surfaces enabling said gauge blocks to be pushed onto said bolt, an end sleeve having a bore adapted to receive-said-boltga conical screw at one end of risaid, bolt, and a split nut screwed onto said coni- .-:'ca1; screW;.-s.a id:;nut having an external diameter 1; adapt d t pass.

-projection on the; ,and-a-ygrooveyin the-. here cf, saidsleeve adapted.

- expandible nut ,hav'

adapted to fit thebore in said sleeve, whereby .bolt with said nut thereon maybe inserted in said sleeve, and means for locking said nut and said RSIEBVQ against rotational movement relatively to one another, whereby zturning movement of said bolt relativelytosaid sleeve expandslsaid nut-and presses th-esame against said: sleeveto lock said sleeve. to said bolt.

2. A ,combinationilength baitggmprising a bolt,

. ain mb r flf au el-hl-ucks. having plane .andparallel .measuring ,surfacesaand.,,pr0vided with through holes; perpendicular tQ-said measuring surfaces enablingfiairtgauge blocks ,to be. pushed -ont rsaid b l anwen tsleevehaving a bore adap ,.ed to receive saidhqlt, aconicalnscrewatone of said boltpa,splitnutecrewed:cntosaid, conical w, said nut. he ing saniexternal diameter ,'5th e- :bore. in said sleeve, a .xtema iamcter. .of. said nut.

to receive. said, prpjectiomon said ,nut, whereby 1 said bolt with. ;Said-..mlt,there0n:may. be. inserted in said sleeve:.and .bedockedtheretoaby turning movement of said bolt relativelyto. said sleeve expanding said ,nutandpressingtM same against said sleeve.

3.--A- combination,-lengtbbar-comprising a, bolt, an end sleeve. havinga boreadapted. to, receive saidbolt, -.a, conical ,screw. atone end. of saidv bolt, asplit nutascrewedidnto said conicalscrew, said V nut havingian externaltgdiametereadapted to. pass into the bore, :in I saidtsleeve, a,-projection on. the

external diameter ofsaid-i-nut, anumber oi-gauge blockshaving, planeand? parallel measuring surfaces and provided-with throu h holes p pendicular to said: measuring {surfaces and adapted. to :fit said bolt and-with {notches in ysaidlholes providing clearance-iforflsaid projection ,on said nut whereby said gauge blocks rmay bemushed over said nut vonto,said;bolilrand a groove, in the. bore of said sleeve adapted tereceive said projection on 1 said nut;- wherebysaid-loolt with said nutthereon may beinserted insaid sleevaandr-bevlocked there- -to by turning ,movementef said-,bolt'relativelyto said sleevexpandin -Saidi,-n-ut -,andpressing the 4. A combination-len ilhrbar-comprisin-g a bolt,

a plurality of; gauge' blockslhaving,plane and par-- :allel measuring surfaces and prov-ided '"w-ith through holes; perpendicular P to said --.measuring surfaces enabling, saidgauge blocks to be disposed v on said bolt, an end sleevehavingan opening cf non-circular crosssection-adapted toreceive said bolt, a conical. screw at: :oneendi-ot said=bo1t, and an expandib-le nut screwedlontosaidconical screw for 1 engaging in-docking, relationship at least a portion of ,thewalh of said openingin said end sleevewhenexpanded rotation of saidbolt, said ;-shape, such that it co operates with. the wall-p ,saidxopeni-ngto-prevent rotational movement of said nut with respect to KARL ERIK EVERT HALLIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Gibbs July 12, 1904 Hoke Apr. 22, 1924 Carr Oct. 18, 1927 Lester Sept. 22, 1942 Lester Mar. 13, 1945 

